/* =====================================================================
   styles.v3.css, additive styles for Main Viewer v3 (AI Chat edition).

   Scoped to .shell.cerulean-v3 so v2 styling is untouched. Loaded
   AFTER styles.v2.css.

   Layout changes:
     - In "Ask" view (.shell.is-ask), the right rail becomes a 440px
       chat panel; the wordmark + small eyebrow sit in row 1.
     - PAGES rail is hidden in Ask view.

   Component additions:
     - .chat-screen, .chat-header, .chat-msg, .cite-chip, .chat-sources,
       .chat-input, .chat-starters
     - .cite-flash (toast inside the document column when a citation
       is opened)
     - .ask-header (replaces SearchHeaderV2 in Ask mode)
   ===================================================================== */


/* ============================================================== */
/*  Ask view shell, workspace grid + header                       */
/* ============================================================== */

.shell.cerulean-v3.is-ask .workspace {
  /* Tree | Doc | Chat. Chat is wider than the pages rail. */
  grid-template-columns: 320px 1fr 440px;
  column-gap: 40px;
  padding: 32px 56px 40px 40px;
}

/* In Ask mode the header is the .ask-header row, not SearchHeaderV2. */
.shell.cerulean-v3.is-ask .ask-header {
  grid-column: 1 / -1;
  grid-row: 1;
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr) auto;
  align-items: center;
  gap: 40px;
}
.shell.cerulean-v3.is-ask .ask-header .wordmark {
  justify-self: start;
}
.shell.cerulean-v3.is-ask .ask-header-spacer {
  /* Pushes the eyebrow to the right column. */
}
.shell.cerulean-v3.is-ask .ask-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--tracking-caps);
  color: var(--muted);
  justify-self: end;
}
.shell.cerulean-v3.is-ask .ask-eyebrow-dot { color: var(--ink-30); }
.shell.cerulean-v3.is-ask .ask-eyebrow-mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0;
  text-transform: none;
  color: var(--muted);
}

/* When in Ask view, the tree's nav-header tabs hide the "Results" tab
   (there's no search). We rely on v2's nav-header markup but tighten
   the layout. The Tree's own header is hidden via the v2 selector. */
.shell.cerulean-v3.is-ask .navigator.v2 .nav-tabs .nav-tab + .nav-tab {
  /* Hide the disabled Results tab in Ask mode, it's noise. */
  display: none;
}


/* ============================================================== */
/*  Chat screen, root + structure                                 */
/* ============================================================== */

.chat-screen {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
  width: 100%;
  font-family: var(--font-sans);
  color: var(--ink);
}

/* ---- Header ---------------------------------------------------- */
.chat-header {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--hairline);
  margin-bottom: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.chat-crumbs {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.chat-crumb {
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--tracking-caps);
  color: var(--muted);
}
.chat-crumb:last-child { color: var(--ink); }
.chat-crumb-sep { color: var(--ink-30); font-size: 10px; }

.chat-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.chat-title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: -0.005em;
  color: var(--ink);
  /* truncate */
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  min-width: 0;
}
.chat-new-btn {
  width: 26px;
  height: 26px;
  background: transparent;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  cursor: pointer;
  transition: color var(--dur-state) var(--ease),
              border-color var(--dur-state) var(--ease);
  flex-shrink: 0;
}
.chat-new-btn:hover { color: var(--ink); border-color: var(--ink-30); }
.chat-new-btn:focus { outline: none; }

/* ---- Message list --------------------------------------------- */
.chat-list {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 4px 4px 16px;
  scrollbar-width: thin;
  scrollbar-color: var(--ink-30) transparent;
}
.chat-list::-webkit-scrollbar { width: 6px; }
.chat-list::-webkit-scrollbar-thumb {
  background: var(--ink-30); border-radius: 3px;
}

/* ---- One message --------------------------------------------- */
.chat-msg {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.chat-msg-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--tracking-caps);
  color: var(--muted);
}
.chat-msg .chat-msg-glyph { color: var(--accent); }
.chat-msg.is-user .chat-msg-label { color: var(--muted); }

.chat-msg-body {
  font-family: var(--font-sans);
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--ink);
}

/* user messages, quietly surfaced on the white-on-bg page */
.chat-msg.is-user .chat-msg-body {
  background: #FFFFFF;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
}

/* assistant, flat type, paragraphs */
.chat-msg.is-assistant .chat-para {
  margin: 0 0 10px;
}
.chat-msg.is-assistant .chat-para:last-child {
  margin-bottom: 0;
}

/* ---- Citation chips ------------------------------------------ */
.cite-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  vertical-align: 1px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  margin: 0 1px;
  background: var(--accent-tint);
  border: 0;
  border-radius: 9px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  color: var(--accent);
  cursor: pointer;
  letter-spacing: 0;
  transition: background var(--dur-state) var(--ease),
              color var(--dur-state) var(--ease);
}
.cite-chip:hover {
  background: var(--accent);
  color: #FFFFFF;
}
.cite-chip:focus { outline: none; }
.cite-chip.is-active {
  background: var(--accent);
  color: #FFFFFF;
}

/* ---- Sources block (under each assistant message) ------------ */
.chat-sources {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--hairline);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.chat-sources-label {
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--tracking-caps);
  color: var(--muted);
}
.chat-sources-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.chat-source {
  display: grid;
  grid-template-columns: 20px auto auto 1fr;
  align-items: center;
  gap: 10px;
  padding: 6px 8px 6px 4px;
  border-radius: 3px;
  cursor: pointer;
  transition: background var(--dur-state) var(--ease);
}
.chat-source:hover { background: #FFFFFF; }
.chat-source.is-active { background: #FFFFFF; }
.chat-source.is-active::before {
  /* Cue the active citation with an accent-tint left bar, same
     pattern as the active tree row. */
}
.chat-source .cs-n {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  background: var(--accent-tint);
  color: var(--accent);
  border-radius: 9px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0;
}
.chat-source.is-active .cs-n {
  background: var(--accent);
  color: #FFFFFF;
}
.chat-source .cs-ser {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0;
}
.chat-source .cs-para {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0;
}
.chat-source .cs-title {
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--ink);
  letter-spacing: -0.005em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---- Thinking indicator -------------------------------------- */
.chat-msg.is-thinking { gap: 6px; }
.chat-thinking {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0 4px;
  font-family: var(--font-sans);
  font-size: 12.5px;
  color: var(--muted);
}
.chat-thinking .dot {
  width: 5px; height: 5px;
  background: var(--muted);
  border-radius: 50%;
  animation: chat-pulse 1.1s ease-in-out infinite;
}
.chat-thinking .dot:nth-child(2) { animation-delay: 0.18s; }
.chat-thinking .dot:nth-child(3) { animation-delay: 0.36s; }
.chat-thinking .thinking-text { margin-left: 4px; }
@keyframes chat-pulse {
  0%, 80%, 100% { opacity: 0.25; }
  40%           { opacity: 1; }
}

/* ---- Starters (empty state) ---------------------------------- */
.chat-starters {
  padding: 8px 4px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.chat-starters-label {
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--tracking-caps);
  color: var(--muted);
}
.chat-starters-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.chat-starter {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  background: transparent;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--ink);
  cursor: pointer;
  transition: border-color var(--dur-state) var(--ease),
              background var(--dur-state) var(--ease);
}
.chat-starter:hover {
  border-color: var(--ink-30);
  background: #FFFFFF;
}
.chat-starter-icon { color: var(--muted); }

/* ---- Input area ---------------------------------------------- */
.chat-input {
  margin-top: 10px;
  background: #FFFFFF;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  transition: border-color var(--dur-state) var(--ease);
}
.chat-input:focus-within { border-color: var(--ink-30); }
.chat-input textarea {
  width: 100%;
  resize: none;
  border: 0;
  outline: 0;
  background: transparent;
  font-family: var(--font-sans);
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--ink);
  padding: 12px 12px 6px;
  min-height: 44px;
}
.chat-input textarea::placeholder { color: var(--muted); }
.chat-input-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 8px 8px 12px;
}
.chat-model {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0;
}
.chat-model .chat-model-glyph { color: var(--accent); }
.chat-send {
  width: 28px;
  height: 28px;
  background: var(--ink);
  border: 0;
  border-radius: var(--radius-sm);
  color: #FFFFFF;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: opacity var(--dur-state) var(--ease),
              background var(--dur-state) var(--ease);
}
.chat-send:hover { opacity: 0.92; }
.chat-send:disabled {
  background: var(--ink-30);
  cursor: default;
  opacity: 1;
}
.chat-send:focus { outline: none; }


/* ============================================================== */
/*  Citation flash overlay, toast inside the doc column            */
/* ============================================================== */

/* The pane-center is already position: relative (from v2). We place a
   small pill at the top of the doc column when a citation is opened. */
.shell.cerulean-v3 .pane-center .cite-flash {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 8;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px 5px 14px;
  background: var(--accent);
  color: #FFFFFF;
  border-radius: 999px;
  box-shadow: 0 2px 8px rgba(26, 31, 43, 0.10);
  font-family: var(--font-sans);
  font-size: 11.5px;
  letter-spacing: 0.01em;
  pointer-events: none;
  animation: cite-flash-in 220ms var(--ease);
}
.shell.cerulean-v3 .pane-center .cite-flash .cf-label {
  font-weight: 500;
}
.shell.cerulean-v3 .pane-center .cite-flash .cf-sep { color: rgba(255,255,255,0.4); }
.shell.cerulean-v3 .pane-center .cite-flash .cf-mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0;
}
@keyframes cite-flash-in {
  from { opacity: 0; transform: translate(-50%, -6px); }
  to   { opacity: 1; transform: translate(-50%, 0); }
}


/* ============================================================== */
/*  Sizing the pane-right column in Ask view                       */
/* ============================================================== */

.shell.cerulean-v3.is-ask .pane-right {
  /* Full-height column so the chat list scrolls inside it. */
  min-height: 0;
  align-self: stretch;
  display: flex;
  flex-direction: column;
  padding-top: 12px;
  padding-bottom: 16px;
  /* The chat input pins to the bottom; the chat list scrolls. */
  height: 100%;
}

/* Cap the chat list height so scroll behaviour is predictable. */
.shell.cerulean-v3.is-ask .chat-list {
  max-height: calc(100vh - 280px);
}


/* ============================================================== */
/*  Misc                                                           */
/* ============================================================== */

/* In Ask view, the InDocMatchBar isn't rendered, but the toolbar is
   still sticky, give the centre column a bit more bottom breathing
   room since the chat is to its right. */
.shell.cerulean-v3.is-ask .pane-center {
  padding-bottom: 16px;
}

/* Hide the Tree's "RESULTS" disabled tab cleanly when Ask is active
   (the rule above already does this; this is a belt-and-braces fix
   in case future Tree variants surface a different element). */
.shell.cerulean-v3.is-ask .navigator.v2 .nav-tab.is-disabled {
  display: none;
}


/* =====================================================================
   ===  v5 layer  ======================================================
   v5 puts the chat on the LEFT, keeps the regular search header at
   the top, replaces "All Documents" with a DocID jump field, builds
   out the Advanced Search popover, and reskins the lower-left corner
   to "Connected to: <city>".
   ===================================================================== */

/* --- ask-mode grid: chat on LEFT, doc center, pages on RIGHT ----- */
.shell.cerulean-v5.is-ask .workspace {
  grid-template-columns: 440px 1fr 180px;
  column-gap: 40px;
  padding: 32px 56px 40px 40px;
}

/* v5 always shows the regular SearchHeader at the top, even in Ask
   mode. So the v3 ask-header is suppressed if it somehow renders. */
.shell.cerulean-v5 .ask-header { display: none; }

/* The header row keeps reaching all the way across in v5 ask mode. */
.shell.cerulean-v5.is-ask .header-bar.v2 {
  grid-template-columns: 440px minmax(420px, 1fr) 120px 32px;
}

/* In ask mode, pane-left hosts the chat. Make sure the chat panel
   fills its column properly. */
.shell.cerulean-v5.is-ask .pane-left {
  min-height: 0;
  align-self: stretch;
  display: flex;
  flex-direction: column;
  height: 100%;
  padding-top: 12px;
  padding-bottom: 16px;
}
.shell.cerulean-v5.is-ask .pane-left .chat-screen {
  height: 100%;
}
.shell.cerulean-v5.is-ask .chat-list {
  max-height: calc(100vh - 240px);
}

/* In Ask mode the right rail still shows PAGES (NOT the chat). */
.shell.cerulean-v5.is-ask .pane-right {
  padding-top: 28px;
  align-self: start;
  height: auto;
  display: block;
}


/* --- Wordmark strap: use the case-name class for the active case --- */
.shell.cerulean-v5 .wm-strap.wm-strap-case {
  /* Render case names in serif italic, they read like a citation,
     and the visual cue distinguishes them from the strapline they
     replace. */
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: 13px;
  letter-spacing: 0.005em;
  text-transform: none;
  color: var(--ink);
}


/* --- DocID jump field (replaces .selector) ---------------------- */
.shell.cerulean-v5 .search-group.v5 {
  /* DocID lookup + free-text search. Slightly narrower DocID col. */
  grid-template-columns: 200px 1fr;
}
.shell.cerulean-v5 .docid {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 10px 0 14px;
  height: 40px;
  background: #FFFFFF;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  transition: border-color var(--dur-state) var(--ease);
}
.shell.cerulean-v5 .docid:focus-within { border-color: var(--ink-30); }
.shell.cerulean-v5 .docid.is-error { border-color: #C44; animation: docid-shake 320ms var(--ease); }
@keyframes docid-shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-3px); }
  40% { transform: translateX(3px); }
  60% { transform: translateX(-2px); }
  80% { transform: translateX(2px); }
}
.shell.cerulean-v5 .docid .docid-label {
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--tracking-caps);
  color: var(--muted);
  flex-shrink: 0;
}
.shell.cerulean-v5 .docid input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0;
  color: var(--ink);
}
.shell.cerulean-v5 .docid input::placeholder {
  color: var(--muted);
  font-family: var(--font-mono);
  letter-spacing: 0;
}
.shell.cerulean-v5 .docid .docid-go {
  width: 22px; height: 22px;
  background: var(--accent);
  color: #FFFFFF;
  border: 0;
  border-radius: 3px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: opacity var(--dur-state) var(--ease);
}
.shell.cerulean-v5 .docid .docid-go:hover { opacity: 0.92; }


/* --- Advanced Search button + popover --------------------------- */
.shell.cerulean-v5 .adv-btn {
  position: relative;
  width: 32px; height: 32px;
  background: transparent;
  border: 0;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  cursor: pointer;
  border-radius: 3px;
  transition: color var(--dur-state) var(--ease),
              background var(--dur-state) var(--ease);
}
.shell.cerulean-v5 .adv-btn:hover { color: var(--ink); background: #FFFFFF; }
.shell.cerulean-v5 .adv-btn.is-open { color: var(--ink); background: #FFFFFF; }
.shell.cerulean-v5 .adv-btn.has-active { color: var(--accent); }
.shell.cerulean-v5 .adv-btn .adv-dot {
  position: absolute;
  top: 6px; right: 6px;
  width: 5px; height: 5px;
  background: var(--accent);
  border-radius: 50%;
}

.shell.cerulean-v5 .adv-pop {
  position: absolute;
  top: 72px;
  right: 56px;
  width: 340px;
  background: #FFFFFF;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  box-shadow: 0 10px 32px rgba(26, 31, 43, 0.10);
  z-index: 80;
  animation: adv-pop-in 160ms var(--ease);
}
@keyframes adv-pop-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.shell.cerulean-v5 .adv-pop::before {
  content: '';
  position: absolute;
  top: -5px;
  right: 14px;
  width: 8px; height: 8px;
  background: #FFFFFF;
  border-left: 1px solid var(--hairline);
  border-top: 1px solid var(--hairline);
  transform: rotate(45deg);
}
.shell.cerulean-v5 .adv-pop-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px 10px;
  border-bottom: 1px solid var(--hairline);
}
.shell.cerulean-v5 .adv-pop-head .panel-label {
  margin: 0; padding-left: 0;
}
.shell.cerulean-v5 .adv-pop-close {
  width: 22px; height: 22px;
  background: transparent;
  border: 0;
  padding: 0;
  color: var(--muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 3px;
  transition: color var(--dur-state) var(--ease);
}
.shell.cerulean-v5 .adv-pop-close:hover { color: var(--ink); }

.shell.cerulean-v5 .adv-pop-body {
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.shell.cerulean-v5 .adv-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.shell.cerulean-v5 .adv-field-label {
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--tracking-caps);
  color: var(--muted);
}
.shell.cerulean-v5 .adv-input {
  width: 100%;
  height: 30px;
  padding: 0 10px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  background: #FFFFFF;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--ink);
  box-sizing: border-box;
  transition: border-color var(--dur-state) var(--ease);
}
.shell.cerulean-v5 .adv-input:focus { border-color: var(--ink-30); outline: none; }
.shell.cerulean-v5 .adv-date-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 8px;
}
.shell.cerulean-v5 .adv-date-sep {
  font-family: var(--font-sans);
  font-size: 11px;
  color: var(--muted);
}
.shell.cerulean-v5 .adv-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}
.shell.cerulean-v5 .adv-chips .filter-chip {
  height: 22px;
  padding: 0 8px;
  font-size: 11.5px;
}
.shell.cerulean-v5 .adv-segment {
  display: inline-flex;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #FFFFFF;
}
.shell.cerulean-v5 .adv-segment button {
  flex: 1;
  height: 28px;
  background: transparent;
  border: 0;
  border-right: 1px solid var(--hairline);
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--ink-70);
  cursor: pointer;
  transition: color var(--dur-state) var(--ease),
              background var(--dur-state) var(--ease);
}
.shell.cerulean-v5 .adv-segment button:last-child { border-right: 0; }
.shell.cerulean-v5 .adv-segment button:hover { color: var(--ink); }
.shell.cerulean-v5 .adv-segment button.is-active {
  color: var(--accent);
  background: var(--accent-tint);
}
.shell.cerulean-v5 .adv-segment button:focus { outline: none; }

.shell.cerulean-v5 .adv-pop-foot {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 14px 12px;
  border-top: 1px solid var(--hairline);
}
.shell.cerulean-v5 .adv-link {
  background: transparent;
  border: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--muted);
  cursor: pointer;
  transition: color var(--dur-state) var(--ease);
}
.shell.cerulean-v5 .adv-link:hover { color: var(--ink); }
.shell.cerulean-v5 .adv-apply {
  height: 28px;
  padding: 0 14px;
  background: var(--ink);
  color: #FFFFFF;
  border: 0;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: opacity var(--dur-state) var(--ease);
}
.shell.cerulean-v5 .adv-apply:hover { opacity: 0.92; }


/* --- Tree row hierarchy: title-first, serial right-aligned ----- */
.shell.cerulean-v5 .tree-row.v5 {
  grid-template-columns: 14px 18px 1fr auto;
  gap: 10px;
  padding-right: 12px;
}
.shell.cerulean-v5 .tree-row.v5 .title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.shell.cerulean-v5 .tree-row.v5 .ser {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0;
}


/* --- Lower-left "Connected to: <city>" status -------------------- */
.shell.cerulean-v5 .index-code.connected-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 11.5px;
  color: var(--muted);
  letter-spacing: 0;
}
.shell.cerulean-v5 .index-code.connected-status .connected-dot {
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  display: inline-block;
}
.shell.cerulean-v5 .index-code.connected-status .connected-city {
  color: var(--accent);
  font-weight: 500;
}


/* --- Settings modal sheet (v5, same recipe as v4) ------------- */
.shell.cerulean-v5 .settings-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(26, 31, 43, 0.18);
  z-index: 200;
  display: flex; align-items: center; justify-content: center;
  animation: v5-settings-fade-in 160ms var(--ease);
}
@keyframes v5-settings-fade-in { from { opacity: 0; } to { opacity: 1; } }
.shell.cerulean-v5 .settings-modal {
  position: relative;
  width: 880px;
  max-width: calc(100vw - 64px);
  max-height: calc(100vh - 80px);
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  box-shadow: 0 12px 36px rgba(26, 31, 43, 0.18);
  display: grid;
  grid-template-columns: 220px 1fr;
  grid-template-rows: auto 1fr;
  overflow: hidden;
  animation: v5-settings-rise 200ms var(--ease);
}
@keyframes v5-settings-rise {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.shell.cerulean-v5 .settings-modal-head {
  grid-column: 1 / -1;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--hairline);
}
.shell.cerulean-v5 .settings-modal-title {
  display: inline-flex; align-items: baseline; gap: 10px;
}
.shell.cerulean-v5 .settings-modal-eyebrow {
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--tracking-caps);
  color: var(--muted);
}
.shell.cerulean-v5 .settings-modal-h {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 18px;
  color: var(--ink);
  margin: 0;
}
.shell.cerulean-v5 .settings-modal-close {
  width: 28px; height: 28px;
  background: transparent;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  color: var(--muted);
  cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  transition: color var(--dur-state) var(--ease), border-color var(--dur-state) var(--ease);
}
.shell.cerulean-v5 .settings-modal-close:hover { color: var(--ink); border-color: var(--ink-30); }
.shell.cerulean-v5 .settings-nav-col {
  border-right: 1px solid var(--hairline);
  padding: 18px 12px;
  display: flex; flex-direction: column;
  overflow-y: auto;
}
.shell.cerulean-v5 .settings-nav-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; }
.shell.cerulean-v5 .settings-nav-row {
  position: relative;
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 10px;
  align-items: center;
  height: 30px;
  padding: 0 10px;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--ink);
  cursor: pointer;
  border-radius: 2px;
  transition: background var(--dur-state) var(--ease);
}
.shell.cerulean-v5 .settings-nav-row:hover { background: var(--bg); }
.shell.cerulean-v5 .settings-nav-row .gly { color: var(--muted); display: inline-flex; }
.shell.cerulean-v5 .settings-nav-row.is-active { color: var(--accent); }
.shell.cerulean-v5 .settings-nav-row.is-active .gly { color: var(--accent); }
.shell.cerulean-v5 .settings-nav-row.is-active::before {
  content: '';
  position: absolute;
  left: -2px; top: 4px; bottom: 4px;
  width: 2px;
  background: var(--accent);
}
.shell.cerulean-v5 .settings-content {
  padding: 24px 32px 32px;
  overflow-y: auto;
}

/* New chat button alignment with the +icon */
.chat-new-btn svg { display: block; }

/* --- direct edit: doc-title font override (m0021) -------------- */
.shell.cerulean-v5 .pane-center .doc-title {
  font-family: BlinkMacSystemFont !important;
}